Java 代码片段

判断偶数

//判断偶数返回1奇数0 。&(2进制与)相同为0不同为1
	private int even(int x){
		if((x & (x - 1)) == 0)
			return 1; //是
		else
			return 0; //否
	}

将\替换成/

		String a="hi.cc.com\\ad";
		System.out.println(a);
		a=a.replaceAll("\\\\", "/");
		System.out.println(a);

打印数组

		String[] s=new String[] {"a","v","b"};
		System.out.println(Arrays.asList(s));